Welcome to FF!

Here's a good dart frog care sheet:
Frog Forum - Imitating Dart Frog, Ranitomeya imitator / Dendrobates imitator (Schulte, 1986) - Care and Breeding

And here's an awesome thread by Bill (Deranged Chipmunk) for vivarium construction:
http://www.frogforum.net/vivarium-te...ion-101-a.html